Improvement in fastenings for hatches of ships



A. JOHNSON. Fastening for Hatches of Ships. 1

No. 222,407. Patented Dec. 9, I879.

UNITED STATEHSPATENT OFFICE AMOS JOHNSON, OF BALTIMORE MARYLAND.

Specification forming part of Letters Patent No. 222,407, dated December9, 1879; application filed IMPROVEMENT IN FASTEYNIN-GS FOR HATCH ES 0FSHIIPS.

October 29, 1879.

To all whom it mayconcem:

Be it known that I, AMOS JOHNSON, ofBal-,

timore city, State of Maryland, have invented certain new and usefulImprovements in Fastenings for Hatches of Ships; and I hereby declarethe same to be fully, clearly, and exactly 1 described as follows,reference being had to the accompanying drawings, in which--- Figure 1is a sectional view of a part of a hatch, combing, and batten having myfastening device. wsleeve; Fig. 3, an end view of the latter.

Fig. 2 is a similar View of the It has heretofore been customary tosecure the hatches of ships against the entrance of i rain or sea waterby covering them with one or more thicknesses of tarpaulin, which lat-By the use of the device about to be described these evils are avoided.The hatches are more securely retained in place, are more 1 readilyremoved when desired, and the oombv ings, battens, and tarpaulins. arenot disfigured.

In the accompanying drawings, A is the. fhatch; B,-the combing; 0, thebatten, and D ,the deck. In the sides of the combing are inwsert'ed, atintervals of a foot or so all around, thimbles or sleeves f, which aremalleable cast- 1 ings of about an inch in diameter by two inches inlength. A deep thread, g, is'caston slot.

- them externally, and they are threaded internally for a portionsayone-half of their. length, as shown at It, the remaining portion,

h, being somewhat enlarged, as illustrated. In

the end is a deep transverse slot, c, for" a wrench, by means of whichthey are screwed into the coinbings.

E are ordinary bolts of a size to fit the sleeves internally, and areused with washers e; U y

In practice, the hatches being laidin place and calked all around, asshown at a, the tarpaulins a are laid upon them and foldedsnugly overthecombings B. The battensO being placed against the latter, the bolts E'are screwed home, making all snug and secure;

j By preference, the castings are galvanized, and thebolts, before beinginserted, are well greased, to prevent rusting; but, even should Y theyrust, the contact-surface on the inside'of the sleeves is not sufticientto cause t-hem ito unscrew from the wood as the bolt lS'LIIP screwed...

If desired, the sleeves may be left-threaded,

therebeing no danger in that case of their be .ing unscrewed in the actof inserting awellgreased bolt; butin any case absolutesecurity isattained by driving a nail, l, (showninfdotted lines,

The device is simple and inexpensive, and thoroughly efficient andsatisfactory in use.

What I claim is- The combination, with the combing and bat tenconstructed substantially as describechof the sleeve f, having internaland external threads, and the bolt E, as andfor the'ypur pose setfor'th.V

' AMOS JOHNSON, -Witnesses: 3 R. D. WILLIAMS,

W. A. BERTRAM.

Fig. 3,)through one side of the

